Simple fire extinguishing apparatus

Abstract

There is provided a simple fire extinguishing apparatus comprising a fire sensor 2 and a fire extinguishing water spraying head 3 positioned at required positions, a water tank 1 serving as a water supply source, a level switch 13 and a resupply port 10 which is not in contact with the water surface, installed in the water tank 1, a driving pump 7, a main pipe 5 allowing the suction and delivery sides of the driving pump 7 respectively to communicate with the water tank 1 and the fire extinguishing water spraying head 3, a control valve 8 installed in the main pipe 5 and adapted to be actuated by the fire sensor 2 and the level switch 13, a resupply pipe 4 branching from a tap water pipe 11 and extending to communicate with the resupply port 10, and a control valve 9 installed in the resupply pipe 4 and adapted to be actuated by the fire sensor 2 and the level switch 13, the arrangement being such that when a fire breaks out, water is fed from the water tank 1 through the main pipe 5 to the fire extinguishing water spraying head 3 and concurrently therewith water is resupplied from the tap water pipe 11 through the resupply pipe 4 and the resupply port 10 to the water tank 1.

What is claimed is: 
     
       1. A simple fire extinguishing apparatus comprising: a fire sensor and a fire extinguishing water spraying head positioned at required positions,   a water supply source comprising a water tank,   a level switch for detecting a maximum water level in the water tank and a resupply port installed in the water tank, wherein the resupply port is disposed at a level above the maximum water level in the water tank,   a driving pump having a suction side and a delivery side,   a main pipe allowing the suction side of the driving pump to communicate with the water tank and the delivery side to communicate through a three-way cock with the fire extinguishing water spraying head and a drain pipe,   a control valve installed in the main pipe and adapted to be actuated by the fire sensor and the level switch,   a resupply pipe branching from a tap water pipe and extending to communicate with the resupply port, and   a control valve installed in the resupply pipe and adapted to be actuated by the fire sensor and the level switch,   whereby when a fire breaks out, water is fed from the water tank through the main pipe to the fire extinguishing water spraying head and concurrently therewith water is resupplied from the tap water pipe through the resupply pipe and the resupply port to the water tank.